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Thread: Revox PR99 MK1

  1. #11
    Join Date: May 2015

    Location: Shrewsbury

    Posts: 57
    I'm Michael.

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    Can anyone comment on differences in SQ between the PR99 Mk1, 2, 3? I read somewhere the Mk1 has a more direct / simpler audio signal path.

  2. #12
    Join Date: Aug 2012

    Location: Hartlepool UK

    Posts: 1,475
    I'm Alan.

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    I haven't done a comparison but would expect the differences to be subtle.
    I have a A77, B77mk2, PR99 mk1 & PR99 mk2 but unfortunately I have only fully serviced and calibrated the B77, Im working on the PR 99 mk1 ATM

    The B77 mk2 and the PR99 mk1 share a lot of the same circuit boards and circuit Diags, except that the PR99 has balanced in/out's, the balance transformers can be a disadvantage in a HIFI environment and an advantage in a pro studio environment. You can also calibrate the PR99 up to +6dB and it has Cal / UnCal buttons to Bye-pass the Volume pots which can also be an advantage as old pots can be noisy and non linear.
    So its swings and roundabouts really ?
    The MK2 has the digital counter/locator and some mods in the circuit boards
    The Mk 3 has significant mods on the circuit boards and more use of Op Amps, digital counter / locator and looks the best IMO (wish I had one but alas)

    For me the best sounding machine will be the one that has the least head wear, been fully serviced and calibrated for a specific tape type.

    Alan
    Turntable - Garrard 401/Jelco 750L/Ortofon Kontrapunkt B, Pioneer PLC 590, SME 3009/2 , Denon DL103R - DIY Paradise Phono stage - Reel 2 Reel Studer A810, Otari MX55,Tascam BR20, Revox A77, B77, PR99, TEAC X1000 & 3440, Technics RS1500 - Digital HTPC / Young Dac - Preamp - DIY B4, 821, Power Amp's DIY Voyager Mono Block, Speakers Tannoy precision 6.4 / Wilmslow Kit Volt BM220.8 / Scanspeak D2905/9500

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